Drilling-machine.



B. WEHNER.

DRIL LING MACHINE.

APPLICATION FILED JAN- 25, 1910.

1,148,640. Patnted Aug 3, 1915.

5 SHEETS-SHEET 1.

lNVENTOH Benjamin We/mer ,BY

B. W,EHNER. DRILLING MACHINE.

APPLICATION HLE D JAN- 26', 1910.

LI-QS MQ. Patented Aug. 3, 1915.

5 SHEETS-SHEET 2.

WITNESSESi INVEN IGR gag 2 Bay 0mm Wahner A WHY EY WM .giw

B WEHNER DRILLING MACHINE.

APPLICATION FILED JAN. 26. 1910.

Patented Aug. 3, 1915.

5 SHEETS-SHEET 5.

INVENTOB 56/1/0070? #76606) T ORNEY iinrrnn STATES PATENT omen.

BENJAMIN WEHNER, OF NORTH BBA DDOCK, PENNSYLVANIA, ASSIGNOR TO WESTING-HOUSE ELECTBIC AND MANUFACTURING COMPANY, A CORPORATION OF PENNSYL-VANIA.

My invention relates to machine tools and particularly to verticaldrilling machines. The obj eat of my inventlon is to provide a simpleand durable drilling machine that shall be adapted for drilling hbles inmarble, slate, soapstone and other similar substances and that may beconveniently operated and adjusted.

When ordinary forms of drilling machines are employed for drilling holesin slate or marble face plates for electric circuit controllers andrheostats, and other similar devices, the process is very slow by reasonof the fact that the drill becomes clogged with the fine powder which isgradually cut away from the face plate as the drill is rotated. Theprocess is quite difierent from that of drilling holes in steel'or castiron and other materials from which chips can be cut by the point andcarried away by the flutes of the drill.

According to my present invention, 1 provide a novel drilling machine inwhich the arrangement of parts is such that the action of gravity tendsto separate the fine particles which are cut away from the slat ormarble which is being drilled as fast as they are loosened from the bodyof the mass, thereby permitting the drill to be fed at a maximum rateand the work to be done with a maximum efficiency. Various structuralimprovements will be hereinafter set forth.

Figure 1 of the accompanying drawings is a view mainly in side elevationbut partially in section of a drilling machine constructed in accordancewith my invention, Fig. 2 is an elevation, at right angles tothat ofFig. 1. Fig. 3 is a partially sectional elevation, on a larger scale, ofthe spindle and supporting brackets. Figs. 4 and 5 are, respectively, aIan and sectional elevation of the adjustab e carriage of the machine towhich the work is secured, Fig. 6 is a plan view of an intermediate lateor surface ,.which is secured to the splndle sleeve and maybe providedwith attachments for car- Specification of Letters Patent. I Applicationfiled January 26, 1910. Serial No. 540,211.

DRILLING-MACHINE.

Patented'Aug. 3, 1915.

' rying other drill'spindles to be driven directly from the mainspindle, the box or caslng for said parts being shown in section. Fig. 7is a perspective view of the auxiliary parts which are shown in plan inFig. 6.

1g. 8 1s a perspective cross-sectional view showing the detailedstructure of the carria e of Fig. 1. eferring to here illustratedcomprises a stationary standard or body member 1 having an enlarged-base2 adapted to rest upon and to be bolted tothe floor or to somehorizontal supporting plane, a spindle bracket3,'a carriage 4 to whichthe bed plate is secured, and a spindle 5. The spindle bracket 3comprises a body 6 which depends from a bed plate 7 on which thecarriage 4 is mounted, and an outwardly extending arm 8 at its lower endhaving bearings 9 and 10 in which the spin-4 the drawings, the machinedle 5 is supported. The extremity of the arm is bifurcated so that adriving pulley 11 may be secured to the spindle and disposed between thetwo portions of the arm, in a well known manner.

The spindle 5 is mounted in a sleeve 12 and is provided with a gearwheel 13 that is rigidly secured to it or is integral with it and restsupon the upper end of the sleeve 12. The upper end 14 of the spindle 5is bored out to receive the usual tapered shank of a standard drill. Thesleeve 12 is prevented from turning by a guide bracket 15 on which it isadjustably supported. The

bracket 15 is mounted on a vertical guide,

handle lever 18 which is adapted to rotate a shaft 19 having a gear 20mounted on it which meshes with a rack 21 on the sleeve 12.

The carriage 4 is adjustably mounted on the bed plate 7 and may be movedto any desired position, by means of an adjusting handle 22 and gearsegment 23 which is rotatably mounted on a shaft 24, the gear segmentbeing adapted to mesh with a rack 25 with which the carriage isprovided.

The body member 1 of the drill press is provided with a bracket 26having a shaft 27 on which a cone or stepped pulley 28 is mounted. Themachine may be driven by v sired holes have any suitable'means, such asa belt 29-for. the cone pulley 28, which, in turn, is belted to thespindle pulley 11.

As shown .in Fig. 3 of the drawings, the handle lever 18 is preferablyconnected to the shaft 19 by means of a pawl 30 and a ratchet 31 inorder that it may always be kept at a convenient angle for the operator.

. An intermediate plate 32 is secured to the upper end of the sleeve 12and 1s adapted to receive auxiliary drillholders or: short spindles suchas the holder 33 (see Figs. '6 and 7) which comprises a stem having agear 34 at its lower end rotatably'mounted on a standard 35 having a pinprojection 36 .by which it maybe bolted to the plate 32.

A driving connection is established from the main spindle to the shortspindle .33 by a' gear 37 which may be disposed, as shown in Fig. 6, tomesh with the gears 13 and 34. The gear wheels are preferably protectedfrom dirt and chips which fall from the drill by a box or casing 38which is secured to the plate 32 and through which the spindleprojection 14 extends.

Assuming that a large number of slate or soapstone disks such as thedisk 39 of Fig.

4 are to be similarly drilled to receivea plurality of contact members,a metal diskor templet 40 is first rovided in which the deeen bored andwhich is provided with a plurality of peripheral notches 41 whichcorrespond in number and central bolt 43 and drilled upwardly, as

shown-in Fig. 1. It is found in practice that holes may be easilydrilled through soap-stone and marble several inches in thickness bymeans of the machine described above, while, with ordinary machines,great" difliculty is experienced, and a considerable length of timeisrequired to do thesame work. As soon as'one hole is completed, the

templet isrotated until the finger 42 comes into engagement with anothernotch in its periphery, whereupon another hole is drilled, and so on,until the work is completed.

7 will be readily understood that the ut1l1ty of the machine illustratedis not restricted to work of any particular form or substance, and, whena number of pieces are to be provided with only two or three holesbearing the same relation to each other in g each piece, the auxiliaryspindles, such as that shown in'Figs. 6- and 7, may be employed in orderthat all of the holes may be I drilledsimultaneously.

7 Variations in the size] and arrangement. of parts maybe effected inthe machineillustrated and described without departing from only suchlimitations shall be imposed as are indicated in the appended claims. Iclaim as my invention: r 1. A' drill press comprising a vertical spindleadapted to receive a drillat its upper end and capable of verticaladjustment,

a carriage ad ustable laterallyin a 'horizonv tal plane above'the drill,anda templet rotatlvely ad ustable on said carriageand provided withposition-accentuating means.

2. A drill .pressfcomprising' a vertical main spindle adapted to receivea drill at its upper end, a supporting bracket, a spindle sleeve mountedin said bracket, means for vertically adjusting said sleeve and itsspindle, a driving pulley for saidspindle, a

plate supported upon said sleeve, an auxiliary spindle vdetachablymounted upon said plate and having means for gearingit the spiritofmy-invention, and I desire that to the main spindle, a horizontalcarriage M above the drill, and means for adjusting the carriage tooverhang the drill.

3. A drill press comprising a 'main spindle adapted to receive a drillat its upper end,

driving means therefor, -'a vertically adjust- .able sleeve forsaidspindle, a plate mounted on said sleeve, and an, auxiliary spindledetachably mounted on said plate and geared to the main spindle.

4. A drill press comprising a main vertical spindleadapted to receive adrill at its upper end, a non-rotative and vertically adjustable bearingsleeve for said spindle, a horizontal plate secured to thesleeve, and anauxiliary spindle detachably'supported upon the plate and operativelyconnected to the .main spindle to be driven thereby.

In testimony whereof, I

have hereunto subscribed my name this 19th day of Jan.

. BENJAMIN WEHNER.

.Witnesses: i

J. D. SUMMERVIILLE,

B. B. HINES.

